Guard.



N. M. BAKER.

GUARD.

APPLICATION FILED MAY 3,1912.

1,093,678. Patented Apr. 2 1, 191

A TTORNE Y S FIGV FIQVI Elem FIGVIH WITNESSES: INVENTOR" M W By J ELS NMBAK R I SWW.

iication of in im rovement.

STATES, PATENT OFFIGE.

NELSON M. BAKER, OF SOUTHBRIDGE, MASSACHUSETTS, ASSIGNOR TO AMERICANOPTICAL COMPANY, OF SOUTHBR-IDGE, MASSACHUSETTS, A CORPORATION OFMASSACHUSETTS.

GUARD.

Specification of Letters Patent. Patented Apr, 21, 191i} Applicationfiled May 3, 1912. Serial No. 694,868.

To all whom it may concern Be it known that I, NELSON M. BAKER, acitizen of the United States, residing at Southbridge, in the county ofWorcester and tate of Massachusetts, have invented certain new anduseful Improvements in Guards, of which the following is aspecification.

My invention relates to improvements in eyeglass guards and hasparticular reference to an improved form of guard for use in thosemountings in which a guard is caused by spring pressure to engage thenose and retain the glasses thereon.

The leading object of my invention is the provision of an improved formof guard which shall be so constructed as to securely engage the nose toprevent both slipping of the guard thereon and more especially toprevent tilting of the guard and mounting.

Figure I represents a front View of a pair of eyeglasses equipped withone form of my improved guard. Fig. II represents a plan View of oneform of my improved guard. Fig. III represents a plan view of anotherform thereof. Fig. IV represents a plan view of another shape embodyingthe generic feature of my invention. Fig. V represents a plan view ofanother shape of guard illus" trating a slightly difi'erent modificationof my invention. Fig. VI represents a plan view of another shape ofguard embodying the said modification. Fig. VII represents a view of anS guard embodying the modi- Fig. VIII represents a view of another shapeof guard embodying my improvement.

In the fitting of eyeglasses and more espe cially in the wearing thereofgreat difliculty is usually experienced in attaining such an adjustmentof the guard and in securing a guard of such peculiar shape that it willsatisfactorily cling to the nose and also will prevent tilting of theglasses. Ordinarily eyeglasses fall from the nose of the wearer onaccount of tilting of the mounting due to the weight of the upperportion of the lenses being disposed forwardly of the center of gravity.In my present invention I have provided guards which overcome thisdefect so far as it is possible to provide a spring actuated guard whichwill obviate this defect present in practically all guards in commonuse.

As eyeglasses tilt to fall off of the nose they to a large extent swingon the bridge or lens clips as a center of pivotance and consequentlythe guard moves substantially as is indicated by the arrows in Fig. II.Consequently to prevent this tilting movement it is necessary to providesome part cular resistance against movement in this direction inaddition to so forming the guard as to satisfactorily engage the nose toprevent the slipping of the entire guard and mounting. To attain thisresult I have formed those forms of my guard 1 shown in Figs. II, IIIand IV with the sharp straight edge 2 at the front upper portion thereofand with a similar edge 3 at the lower rear portion thereof. It willthus be seen that as the guard tends to shift in the direction indicatedby the arrows the edge 2 will bite into the flesh at the upper )ortionof the nose and will resist forwar movement of the top of the guardwhile at the same time the edge 3 will bite into the flesh at the lowerpart of the nose and prevent rearward movement of the lower end of theguard, the guard being thus almost locked against tilting movement,whereby its clinging efficiency is very greatly increased.

In those forms of my invention shown in Figs. V, VI, VII and VIII, Ihave further slightly modified the guard in that in place of having thesubstantially vertical portions 2 and 3 I have the port-ions 2 and 3,the edge 2 inclining downwardly and inwardly while the portion 8inclines upwardly and out-wardly relative to the guard. The furtheradvantage of this form of my invention will be at once apparent to allthose familiar with the fitting or wearing of eye glasses. It is to benoted that eyeglass guards do not rest in a vertical position but arealways disposed at an angle from the vertical in order that they maycorrectly fit against the sides of the nose ofthe wearer. vVhen in thisposition, particularly on noses with a decided flare from the bridge,the straight edges 2 and 3 as shown have a tendency to engage only atthe outer corners after the glasses have slightly slipped and,therefore, do not attain entire efficiency in preventing tilting of theglasses. The forms shown in Figs. V to VIII inclusive obviate anyobjection of this character, however, in that as the guards start totilt the angle of the edge 2 causes the entire edge to bite into theflesh over the bridge of the nose while likewise the angle ofinclination of the portion 3 at the lower end of the guard socorresponds to the flaring shape of the bony part of the nose that theentire edge 3 will bite into the flesh over said bony part and will thusresist rearward movement of the lower portion of the guard.

By reference to the drawings it will be observed that in all of theforms of my guard illustrated the upper portion of the guard having theedge 2 or 2 and the lower portion thereof having the edge 8 or 3 areconnected by a reduced portion 4; which is formed of pliable material.This reduced portion 4: thus permits of bending and relative twisting oftherupper and lower portions of the guard so that the uard may readilybe adapted to the contour of the nose of the individual wearer and alsoso that the ed 'es 2 and 3 or 2 and 3 may be adjusted with respect toeach other so that both of the edges will bite in correctly to preventtilting of the nose.

From the foregoing description taken in connection with the accompanyingdrawings the construction of my improved eyeglass guard will be readilyapparent, and it will be seen that I have provided a thoroughlypractical and efficient guard which will satisfactorily prevent tiltingof the guard and thus of the mounting and will thus'command itself toall as a highly desirable and efficient construction.

I claim:

1. A guard comprising an upper outwardly offset bearing portion with astraight front edge, a lower inwardly ollset bearing portion with astraight rear edge, and a stem connecting the bearing portions adaptedto incline the straight edges toward portion having an upwardly andoutwardly inclined rear edge and a stem connecting the bearing portionsadapted to incline the straight edges toward the nose when twistedtorsionally.

4. A. nose guard comprising a stem, a straight edged upper bearingportion out wardly offset from the stem, a straight edged lower bearingportion inwardly oilset from the stem, said straight edges beingrelatively short. terminally disposed and cut back from a sharp cornerto the stem and adapted to be turned toward the nose by twisting thestem.

In testimony whereof I ailix my signature in presence of two witnesses.

NELSON M. BAKER.

Witnesses Anion M. HoAn, JOSEPH J. DEMEN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

